/**
 *  Version 2.4.0 Copyright (C) 2013
 *  Tested in IE 11, FF 28.0 and Chrome 33.0.1750.154
 *  No official support for other browsers, but will TRY to accommodate challenges in other browsers.
 *  Example:
 *      Print Button: <div id="print_button">Print</div>
 *      Print Area  : <div class="PrintArea" id="MyId" class="MyClass"> ... html ... </div>
 *      Javascript  : <script>
 *                       $("div#print_button").click(function(){
 *                           $("div.PrintArea").printArea( [OPTIONS] );
 *                       });
 *                     </script>
 *  options are passed as json (example: {mode: "popup", popClose: false})
 *
 *  {OPTIONS}   | [type]     | (default), values      | Explanation
 *  ---------   | ---------  | ---------------------- | -----------
 *  @mode       | [string]   | (iframe),popup         | printable window is either iframe or browser popup
 *  @popHt      | [number]   | (500)                  | popup window height
 *  @popWd      | [number]   | (400)                  | popup window width
 *  @popX       | [number]   | (500)                  | popup window screen X position
 *  @popY       | [number]   | (500)                  | popup window screen Y position
 *  @popTitle   | [string]   | ('')                   | popup window title element
 *  @popClose   | [boolean]  | (false),true           | popup window close after printing
 *  @extraCss   | [string]   | ('')                   | comma separated list of extra css to include
 *  @retainAttr | [string[]] | ["id","class","style"] | string array of attributes to retain for the containment area. (ie: id, style, class)
 *  @standard   | [string]   | strict, loose, (html5) | Only for popup. For html 4.01, strict or loose document standard, or html 5 standard
 *  @extraHead  | [string]   | ('')                   | comma separated list of extra elements to be appended to the head tag
 */
layui.define(["jquery"], function (exports) {
    var jQuery = layui.jquery;
    (function($) {
        var counter = 0;
        var modes = { iframe : "iframe", popup : "popup" };
        var standards = { strict : "strict", loose : "loose", html5 : "html5" };
        var defaults = { mode       : modes.iframe,
                         standard   : standards.html5,
                         popHt      : 500,
                         popWd      : 400,
                         popX       : 200,
                         popY       : 200,
                         popTitle   : '',
                         popClose   : false,
                         extraCss   : '',
                         extraHead  : '',
                         retainAttr : ["id","class","style"] };

        var settings = {};//global settings

        $.fn.printArea = function( options )
        {
            $.extend( settings, defaults, options );

            counter++;
            var idPrefix = "printArea_";
            $( "[id^=" + idPrefix + "]" ).remove();

            settings.id = idPrefix + counter;

            var $printSource = $(this);

            var PrintAreaWindow = PrintArea.getPrintWindow();

            PrintArea.write( PrintAreaWindow.doc, $printSource );

            setTimeout( function () { PrintArea.print( PrintAreaWindow ); }, 1000 );
        };

        var PrintArea = {
            print : function( PAWindow ) {
                var paWindow = PAWindow.win;

                $(PAWindow.doc).ready(function(){
                    paWindow.focus();
                    paWindow.print();

                    if ( settings.mode == modes.popup && settings.popClose )
                        setTimeout(function() { paWindow.close(); }, 2000);
                });
            },
            write : function ( PADocument, $ele ) {
                PADocument.open();
                PADocument.write( PrintArea.docType() + "<html>" + PrintArea.getHead() + PrintArea.getBody( $ele ) + "</html>" );
                PADocument.close();
            },
            docType : function() {
                if ( settings.mode == modes.iframe ) return "";

                if ( settings.standard == standards.html5 ) return "<!DOCTYPE html>";

                var transitional = settings.standard == standards.loose ? " Transitional" : "";
                var dtd = settings.standard == standards.loose ? "loose" : "strict";

                return '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01' + transitional + '//EN" "http://www.w3.org/TR/html4/' + dtd +  '.dtd">';
            },
            getHead : function() {
                var extraHead = "";
                var links = "";

                if ( settings.extraHead ) settings.extraHead.replace( /([^,]+)/g, function(m){ extraHead += m });

                $(document).find("link")
                    .filter(function(){ // Requirement: <link> element MUST have rel="stylesheet" to be considered in print document
                            var relAttr = $(this).attr("rel");
                            return ($.type(relAttr) === 'undefined') == false && relAttr.toLowerCase() == 'stylesheet';
                        })
                    .filter(function(){ // Include if media is undefined, empty, print or all
                            var mediaAttr = $(this).attr("media");
                            return $.type(mediaAttr) === 'undefined' || mediaAttr == "" || mediaAttr.toLowerCase() == 'print' || mediaAttr.toLowerCase() == 'all'
                        })
                    .each(function(){
                            links += '<link type="text/css" rel="stylesheet" href="' + $(this).attr("href") + '" >';
                        });
                if ( settings.extraCss ) settings.extraCss.replace( /([^,\s]+)/g, function(m){ links += '<link type="text/css" rel="stylesheet" href="' + m + '">' });

                return "<head><title>" + settings.popTitle + "</title>" + extraHead + links + "</head>";
            },
            getBody : function ( elements ) {
                var htm = "";
                var attrs = settings.retainAttr;
                elements.each(function() {
                    var ele = PrintArea.getFormData( $(this) );

                    var attributes = ""
                    for ( var x = 0; x < attrs.length; x++ )
                    {
                        var eleAttr = $(ele).attr( attrs[x] );
                        if ( eleAttr ) attributes += (attributes.length > 0 ? " ":"") + attrs[x] + "='" + eleAttr + "'";
                    }

                    htm += '<div ' + attributes + '>' + $(ele).html() + '</div>';
                });

                return "<body>" + htm + "</body>";
            },
            getFormData : function ( ele ) {
                var copy = ele.clone();
                var copiedInputs = $("input,select,textarea", copy);
                $("input,select,textarea", ele).each(function( i ){
                    var typeInput = $(this).attr("type");
                    if ($.type(typeInput) === 'undefined') typeInput = $(this).is("select") ? "select" : $(this).is("textarea") ? "textarea" : "";
                    var copiedInput = copiedInputs.eq( i );

                    if ( typeInput == "radio" || typeInput == "checkbox" ) copiedInput.attr( "checked", $(this).is(":checked") );
                    else if ( typeInput == "text" ) copiedInput.attr( "value", $(this).val() );
                    else if ( typeInput == "select" )
                        $(this).find( "option" ).each( function( i ) {
                            if ( $(this).is(":selected") ) $("option", copiedInput).eq( i ).attr( "selected", true );
                        });
                    else if ( typeInput == "textarea" ) copiedInput.text( $(this).val() );
                });
                return copy;
            },
            getPrintWindow : function () {
                switch ( settings.mode )
                {
                    case modes.iframe :
                        var f = new PrintArea.Iframe();
                        return { win : f.contentWindow || f, doc : f.doc };
                    case modes.popup :
                        var p = new PrintArea.Popup();
                        return { win : p, doc : p.doc };
                }
            },
            Iframe : function () {
                var frameId = settings.id;
                var iframeStyle = 'border:0;position:absolute;width:0px;height:0px;right:0px;top:0px;';
                var iframe;

                try
                {
                    iframe = document.createElement('iframe');
                    document.body.appendChild(iframe);
                    $(iframe).attr({ style: iframeStyle, id: frameId, src: "#" + new Date().getTime() });
                    iframe.doc = null;
                    iframe.doc = iframe.contentDocument ? iframe.contentDocument : ( iframe.contentWindow ? iframe.contentWindow.document : iframe.document);
                }
                catch( e ) { throw e + ". iframes may not be supported in this browser."; }

                if ( iframe.doc == null ) throw "Cannot find document.";

                return iframe;
            },
            Popup : function () {
                var windowAttr = "location=yes,statusbar=no,directories=no,menubar=no,titlebar=no,toolbar=no,dependent=no";
                windowAttr += ",width=" + settings.popWd + ",height=" + settings.popHt;
                windowAttr += ",resizable=yes,screenX=" + settings.popX + ",screenY=" + settings.popY + ",personalbar=no,scrollbars=yes";

                var newWin = window.open( "", "_blank",  windowAttr );

                newWin.doc = newWin.document;

                return newWin;
            }
        };
    })(jQuery);
    exports('PrintArea', null);
});